Central heating boiler auxiliary heat exchanger

(19)

(11)

EP 1 707 896 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	06.05.2009 Bulletin 2009/19

(43)	Date of publication A2:
	04.10.2006 Bulletin 2006/40

(21)	Application number: 06110870.0

(22)	Date of filing: 08.03.2006

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International Patent Classification (IPC):

F24H 8/00^(2006.01)

F24H 9/00^(2006.01)

(84)	Designated Contracting States:
	AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
	Designated Extension States:
	AL BA HR MK YU

(30)

Priority:

09.03.2005 GB 0504796

(71)	Applicant: Heating World Group Limited
	Birmingham B18 7AD (GB)

(72)	Inventor:
	Bosworth, John Frederick Michael Kidderminster, Worcestershire DY10 3PJ (GB)

(74)	Representative: Gillam, Francis Cyril et al
	SANDERSON & CO. 34, East Stockwell Street Colchester Essex CO1 1ST Colchester Essex CO1 1ST (GB)

(54)	Central heating boiler auxiliary heat exchanger

(57) An auxiliary heat exchanger for the flue gases of an oil-fired or gas-fired central heating boiler, has a box-like water chamber (10) with two relatively large opposed external surfaces (12) spaced apart by a relatively small distance. There is a water inlet (16) to and a water outlet (17) from the chamber (10). A box-like casing (11) surrounds the external surfaces (12) with a small clearance, the casing having a flue gas inlet (32) and a flue gas outlet (33). The casing (11) has an open side wall so that the casing is removable from the chamber (10) for servicing by sliding the casing relative to the chamber. A seal arrangement (23) closes the space between the casing and the chamber.

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